Water Heater Trouble: Fix It or Replace It?

How do the two main rules work in practice?

HomeGuide suggests two tests: consider replacing any heater older than 10 years, and any heater where the repair would cost more than 50 percent of a new one. A couple of examples show how they play out.

• A 7-year-old electric tank with lukewarm water. A heating element runs $100 to $350 according to HomeGuide, and a new 50-gallon tank runs $700 to $3,100 installed. Repair wins easily.
• A 13-year-old gas tank whose burner won't fire. A gas control valve is $150 to $550. That is less than a new tank on paper, but the heater is already past the 10 to 15 years the U.S. Department of Energy gives storage tanks. Money spent here may only buy a year or two.
• Any age, water seeping from the bottom. HomeGuide notes that a leak from the tank bottom usually means the whole unit has to go.

How can you tell how old your heater is?

Look at the rating plate on the side of the tank. Many manufacturers stamp the build date on it, and others code the month and year into the first characters of the serial number. A quick search for the brand's serial number format will decode it. If the plate is unreadable, the installation permit or a receipt from a previous owner may help. Write down the model, serial number, gallon capacity and fuel type while you are there, because the plumber will ask for them.

Lifespan estimates vary. The DOE says 10 to 15 years for a tank. HomeGuide's installation guide says 8 to 12 years, or up to about 15 with regular maintenance.

Which symptom points to which repair?

HomeGuide's 2026 repair guide gives these typical installed prices for single-part fixes:

A plumber who handles water heater repairs in Winston-Salem can test the element, thermostat or thermocouple during one visit. HomeGuide also recommends checking the anode every 3 to 5 years, and a fresh rod is one of the least expensive ways to stretch a tank's life.

Do not cap or plug a dripping relief valve pipe. That valve keeps a tank from building dangerous pressure, and a drip can mean the pressure or temperature is too high rather than the valve being worn.

What does it mean when the tank itself leaks?

Steel tanks corrode from the inside. Once the shell rusts through there is no lasting patch, so the leak will only grow. Turn off the cold water valve above the heater, switch off the breaker or set the gas control to off, and plan for a new heater. Before you assume the worst, though, dry the area and watch. Water from a loose fitting on top, from the relief valve pipe, or from a nearby supply line can pool at the base and look like a tank leak. If you can't trace it, a leak detection visit will settle it.

What will a new heater cost around Winston-Salem?

HomeGuide's 2026 installation guide gives these installed ranges:

Extras can include haul-away of the old unit ($75 to $500), an expansion tank where one is required ($100 to $400) and code-required plumbing updates ($75 to $500). For the permit, the Winston-Salem/Forsyth County Inspections Division's April 2026 schedule lists a $100 flat fee for a water heater changeout, electrical included. That office also handles Clemmons, Lewisville, Rural Hall, Tobaccoville, Walkertown and Bethania. In Rowan County, the February 2024 schedule lists $75 for a storage tank and $90 for tankless. When you are ready to compare prices, start with water heater replacement in the city, or look for a plumber who handles heater swaps in Clemmons if you live west of town.

Does local water quality change the math?

It works in your favor if you are on city water. Winston-Salem/Forsyth County Utilities draws from the Yadkin River and Salem Lake, and its 2025 water quality report lists hardness of 9 to 28 parts per million, averaging 17.5, which is soft. Soft water leaves less scale on elements and the tank floor, though sediment still collects over time and a yearly flush is still worthwhile.

Well water is another matter. Forsyth County Environmental Health permits private wells in the rural parts of the county, and about half of Rowan County residents relied on wells as of 2015. Well water can carry minerals or iron that shorten a heater's life. Have it tested, and if the results call for treatment, a plumber who works on softeners in the Salisbury area can size one before the new heater goes in.

Is this the time to change heater types?

A failed heater is the most practical moment to switch, because you are paying for installation anyway. HomeGuide's 2026 figures for the main alternatives:

• Hybrid heat pump tank: $2,000 to $4,600 installed. Yearly operating cost runs about $160 to $190, compared with $530 to $600 for a standard electric tank. It needs open air around it, so a tight closet may rule it out.
• Tankless: $1,400 to $5,600 installed, with a 15 to 20 year life. Going from tank to tankless can add $600 to $2,500 in labor and possibly a gas line upgrade or new circuit. Our tank versus tankless comparison covers the tradeoffs, and you can read more about tankless installs in Winston-Salem.
• Changing fuel: electric to gas runs $400 to $2,000 or more, and gas to electric $250 to $1,000 or more.

If you just need hot water back fast, replacing like with like is almost always quickest, since the venting, gas line or wiring is already in place.

What should you check before calling?

• Electric heater, no hot water: check the breaker panel. If a reset breaker trips again, leave it off.
• Gas heater, no hot water: look through the sight window for the pilot. Relight only by following the label instructions, and never if you smell gas.
• Puddle near the heater: note where fresh water appears after you dry the floor.

What should you ask the plumber on the visit?

Ask for two prices on the same trip: the repair, and a comparable new heater installed. Then ask a few follow-up questions so the numbers mean something:

1. Is the part still available for this model, and is it covered by any remaining warranty?
2. Did you see signs of corrosion or sediment that suggest the tank is near the end?
3. Does the replacement price include the permit, haul-away, an expansion tank and any code updates?
4. If I replace, should the size stay the same, or does my household need more capacity?

With the repair cost, the heater's age and the half-of-replacement rule side by side, the decision is usually obvious.

If there is any gas odor, leave the house and call 911 or Piedmont Natural Gas at 800-752-7504 from outside. In Lexington, which runs its own city gas system, call 911 or the city's gas utility. Our page on what to do about a gas smell has more, and the Winston-Salem plumbing price guide covers what other repairs cost. Homeowners east of the city can also look for heater repair in Kernersville.